Astrocal for ChatGPT

dev.astrocal/mcp-server

AI-native scheduling: check availability, book meetings, cancel and reschedule via MCP

client:ChatGPT transport:streamable-http runtime:npm

Install Astrocal in ChatGPT

Settings → Connectors → Advanced → Developer mode

https://api.astrocal.dev/mcp

Custom connectors are a paid-plan feature and take a remote URL only. ChatGPT cannot run a packaged server locally. ChatGPT docs